Another of these factors is infertility. Generally, female gorillas mature at 10â12 years of age (or earlier at 7â8 years) and their male counterparts mature more slowly, rarely strong and dominant enough to reproduce before 15â20 years of age.
A herniated disk, sometimes (incorrectly) called a slipped disk, is a common cause of severe back pain and sciatica. A disk in the lumbar area becomes herniated when it ruptures or thins out, and degenerates to the point that the gel within the disk (the nucleus pulposus) pushes outward.
Related questions. 1  Pain and weakness in the back of my left leg, mostly calve muscle. Is it piriformis sydrome or more likely l5/s1 more Pain and weakness in the back of my left leg, mostly calve muscle. 2  Can piriformis muscle syndrome cause sciatica type symptoms (pain and tingling in legs).